1.0.5 Load Time and HDD Thrashing Investigation

Ellay, can you explain a litttle more about mpq files? I am multiboxing 4 accounts, in pc\mpqs folders, which directories\files should I link to usb drive? I have 8g usb drive, 5 direcotries of cache, cache-1, cache-2, cache-3, cache-4 each 4G size.